Company lists · Data refreshed October 2026

Top 25 Nonprofit solar organizations based in the United States

Name: Nonprofit solar organizations based in the United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Oct 18, 2026 4,666 companies tracked

RevenueBase identified 4,666 company matches for nonprofit solar organizations associated with the United States as of October 2026 and tracks 95,031 professional contacts across them, including 28,420 with verified work emails. San Diego is the largest hub.

This list covers company matches for nonprofit solar organizations associated with the United States, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed October 18, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.

How to read this list RevenueBase SmartSearch · Exact Recorded Oct 18, 2026 How this list was built

4,666Companies

95,031Contacts tracked

28,420Verified emails

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The 25 largest nonprofit solar organizations based in the United States

Ranked by team size

Top 25 of 4,666 company matches for nonprofit solar organizations based in the United States, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Oct 18, 2026. The RevenueBase SmartSearch column shows Exact match membership in this saved search. Click a contact count to view that company's people. Totals use company locations recorded by RevenueBase; the displayed preview is a smaller selection.
#	Company	RevenueBase SmartSearch	Headquarters	Employees	Contacts
1	Sunrun	Exact match	San Francisco, CA, United StatesHQ recorded Oct 18, 2026	10001+	7,991 contacts →
	Exact match “Life runs on clean energy.” Recorded in the RevenueBase company graph · Oct 18, 2026 · View company records in RevenueBase
2	First Solar	Exact match	Tempe, AZ, United StatesHQ recorded Oct 18, 2026	5,001-10,000	5,777 contacts →
	Exact match “First Solar, Inc.” Recorded in the RevenueBase company graph · Oct 18, 2026 · View company records in RevenueBase
3	Sunpower Corporation	Exact match	Richmond, CA, United StatesHQ recorded Oct 18, 2026	1,001-5,000	2,009 contacts →
	Exact match “We believe clean energy and backup storage should be accessible to everybody.” Recorded in the RevenueBase company graph · Oct 18, 2026 · View company records in RevenueBase
4	Trinity Solar	Exact match	Wall Township, NJ, United StatesHQ recorded Oct 18, 2026	1,001-5,000	1,782 contacts →
	Exact match “Trinity Solar is one of the largest privately held residential solar companies in the nation.” Recorded in the RevenueBase company graph · Oct 18, 2026 · View company records in RevenueBase
5	Freedom Forever	Exact match	Temecula, CA, United StatesHQ recorded Oct 18, 2026	1,001-5,000	1,684 contacts →
	Exact match “Freedom Forever is a residential solar installation company that partners with solar sales companies in the industry.” Recorded in the RevenueBase company graph · Oct 18, 2026 · View company records in RevenueBase
6	Goodleap	Exact match	Roseville, CA, United StatesHQ recorded Oct 18, 2026	501-1,000	1,197 contacts →
	Exact match “GoodLeap is a technology company delivering best-in-class financing and software products for sustainable solutions, from solar panels and batteries to energy-efficient HVAC, heat…” Recorded in the RevenueBase company graph · Oct 18, 2026 · View company records in RevenueBase
7	Powur, PBC	Exact match	San Diego, United StatesHQ recorded Oct 18, 2026	n/a	1,097 contacts →
	Exact match “The Powur Mission: Accelerate the adoption of clean energy worldwide We're empowering our community of homeowners and advisors to thrive in the global shift to sustainable energy.” Recorded in the RevenueBase company graph · Oct 18, 2026 · View company records in RevenueBase
8	Blue Raven Solar	Exact match	Orem, UT, United StatesHQ recorded Oct 18, 2026	1,001-5,000	1,075 contacts →
	Exact match “Blue Raven Solar, a SunPower Company, is a retailer of residential home solar systems.” Recorded in the RevenueBase company graph · Oct 18, 2026 · View company records in RevenueBase
9	ION Solar	Exact match	Provo, UT, United StatesHQ recorded Oct 18, 2026	501-1,000	913 contacts →
	Exact match “Ion Solar is a premium, full-service solar provider.” Recorded in the RevenueBase company graph · Oct 18, 2026 · View company records in RevenueBase
10	d.light	Exact match	San Francisco, CA, United StatesHQ recorded Oct 18, 2026	501-1,000	903 contacts →
	Exact match “d.light is a global leader and pioneer in delivering affordable solar-powered solutions designed for the two billion people in the developing world without access to reliable…” Recorded in the RevenueBase company graph · Oct 18, 2026 · View company records in RevenueBase
11	Grid Alternatives	Exact match	Oakland, CA, United StatesHQ recorded Oct 18, 2026	201-500	714 contacts →
	Exact match “GRID Alternatives is a national leader in bringing affordable solar power, clean mobility, and energy storage to underserved communities while creating pathways to life-changing…” Recorded in the RevenueBase company graph · Oct 18, 2026 · View company records in RevenueBase
12	LUMIO	Exact match	Lehi, UT, United StatesHQ recorded Oct 18, 2026	5,001-10,000	659 contacts →
	Exact match “We’re on a mission to make power personal.” Recorded in the RevenueBase company graph · Oct 18, 2026 · View company records in RevenueBase
13	Depcom Power, INC	Exact match	Scottsdale, AZ, United StatesHQ recorded Oct 18, 2026	1,001-5,000	631 contacts →
	Exact match “DEPCOM Power, a Koch Engineered Solutions Company, is a leading solar energy solutions partner providing Development Support, Engineering, Procurement & Construction (EPC)…” Recorded in the RevenueBase company graph · Oct 18, 2026 · View company records in RevenueBase
14	Nexamp	Exact match	Boston, MA, United StatesHQ recorded Oct 18, 2026	201-500	610 contacts →
	Exact match “Nexamp is leading the transformation to the new energy economy with proven solutions for the deployment and operation of solar energy assets.” Recorded in the RevenueBase company graph · Oct 18, 2026 · View company records in RevenueBase
15	Palmetto	Exact match	Charlotte, NC, United StatesHQ recorded Oct 18, 2026	201-500	606 contacts →
	Exact match “Palmetto is a leading clean tech company on a mission to accelerate the transition to a clean energy future.” Recorded in the RevenueBase company graph · Oct 18, 2026 · View company records in RevenueBase
16	Greentech Renewables	Exact match	San Diego, CA, United StatesHQ recorded Oct 18, 2026	1,001-5,000	600 contacts →
	Exact match “As Greentech Renewables, we prioritize our commitment to providing customers with exceptional service and top-tier products from prominent renewable energy manufacturers.” Recorded in the RevenueBase company graph · Oct 18, 2026 · View company records in RevenueBase
17	Apex Clean Energy	Exact match	Charlottesville, VA, United StatesHQ recorded Oct 18, 2026	201-500	574 contacts →
	Exact match “Apex Clean Energy was founded with a singular focus: to accelerate the shift to clean energy.” Recorded in the RevenueBase company graph · Oct 18, 2026 · View company records in RevenueBase
18	Renesola LTD	Exact match	Stamford, CT, United StatesHQ recorded Oct 18, 2026	201-500	466 contacts →
	Exact match “As of January 30th, 2023, ReneSola Power Ltd has rebranded to become Emeren Group Ltd (NYSE: SOL).” Recorded in the RevenueBase company graph · Oct 18, 2026 · View company records in RevenueBase
19	Solar Energy Industries Association	Exact match	Washington, DC, United StatesHQ recorded Oct 18, 2026	51-200	451 contacts →
	Exact match “The Solar Energy Industries Association (SEIA®) is leading the transformation to a clean energy economy.” Recorded in the RevenueBase company graph · Oct 18, 2026 · View company records in RevenueBase
20	Titan Solar Power	Exact match	Santa Ana, CA, United StatesHQ recorded Oct 18, 2026	1,001-5,000	449 contacts →
	Exact match “EnergyAid acquired Titan Solar Power's intellectual property (IP) in March of 2025 through bankruptcy court.” Recorded in the RevenueBase company graph · Oct 18, 2026 · View company records in RevenueBase
21	Posigen	Exact match	St. Rose, LA, United StatesHQ recorded Oct 18, 2026	501-1,000	433 contacts →
	Exact match “PosiGen is the nation's leading residential solar and energy efficiency provider.” Recorded in the RevenueBase company graph · Oct 18, 2026 · View company records in RevenueBase
22	REC Solar	Exact match	San Luis Obispo, CA, United StatesHQ recorded Oct 18, 2026	n/a	423 contacts →
	Exact match “Founded in 1997, REC Solar has emerged as a leader in the solar industry, installing 800+ solar and storage solutions for commercial and public sector customers nationwide.” Recorded in the RevenueBase company graph · Oct 18, 2026 · View company records in RevenueBase
23	Freedom Solar Pros LLC	Exact match	Chandler, AZ, United StatesHQ recorded Oct 18, 2026	51-200	388 contacts →
	Exact match “The future of Solar Sales” Recorded in the RevenueBase company graph · Oct 18, 2026 · View company records in RevenueBase
24	Energyscape Renewables	Exact match	Denver, United StatesHQ recorded Oct 18, 2026	501-1,000	388 contacts →
	Exact match “Established in 2019.” Recorded in the RevenueBase company graph · Oct 18, 2026 · View company records in RevenueBase
25	OUR World Energy	Exact match	Phoenix, AZ, United StatesHQ recorded Oct 18, 2026	201-500	377 contacts →
	Exact match “https://ourworldenergy.com/” Recorded in the RevenueBase company graph · Oct 18, 2026 · View company records in RevenueBase

RevenueBase SmartSearch

Describe a niche business in your own words. RevenueBase SmartSearch compares the meaning of your description with company business descriptions compiled in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit.

This list uses Exact for “nonprofit solar organizations”. Each Exact match badge shows membership in that saved search; it is not an individual similarity score or a service-quality rating. Recorded descriptions are shown where available.

Showing 25 of 4,666 nonprofit solar organizations based in the United States

See the full list, filter by size, metro and specialty, and access 28,420 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Nonprofit solar organizations based in the United States at a glance

As of Oct 18, 2026

29.9%Verified-email coverage

20.4Average contacts per company

11-50Median size (employees)

2.0%Largest-city concentration · San Diego

Oct 18, 2026Page data refreshed

Companies by employee count

1-10

1,995

11-50

1,846

51-200

616

201-500

118

501-1,000

1,001-5,000

5,001-10,000

10001+

Email recency for this list is measured worldwide rather than for United States, so it is reported there. Company counts and contact totals on this page are exact for United States, over 4,666 companies.

How this list was built

The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.

Source: The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase SmartSearch, the natural-language company search available to every RevenueBase user.
What qualifies: Company records associated with the United States whose business descriptions match “nonprofit solar organizations” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
RevenueBase SmartSearch: Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
Public preview: The public preview omits records without a verified work email. Where headquarters information is recorded, preview rows are also filtered to this page’s location. Dataset totals and geographic summaries describe the full matched records before these preview filters.
Match quality: RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
Ranking: Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
Verification: Every displayed company carries at least one verified work email. RevenueBase tracks 28,420 professional contacts with verified work emails across the full matched dataset. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
Refresh: This page's figures were pulled from the company graph on October 18, 2026. Lists refresh periodically as the graph is re-checked.
Record context: Company records and descriptions can change. Check the company's website for its current services and locations.

Nonprofit solar organizations by metro

Frequently asked

What is RevenueBase SmartSearch?

RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “nonprofit solar organizations”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many nonprofit solar organizations are there based in the United States?

RevenueBase identified 4,666 company matches for nonprofit solar organizations associated with the United States as of October 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.

What is the largest company on this list?

Sunrun tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city has the most nonprofit solar organizations?

San Diego leads with 93 company records, followed by New York (76) and Los Angeles (75).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work limited free results with 500 credits to start. Upgrading provides access to the 28,420 professional contacts with verified work emails tracked across these 4,666 companies; direct dials are available where recorded.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on October 18, 2026.

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About this data

RevenueBase is a B2B data infrastructure company. Its company graph covers 60 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph with RevenueBase SmartSearch, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.